@echo off   :: Stops commits that have empty log messages.         @echo off   setlocal   rem Subversion sends through the path to the repository and transaction id   set REPOS=%1   set TXN=%2            svnlook log %REPOS% -t %TXN% | findstr . > nul   if %errorlevel% gtr 0 (goto err) else exit 0   :err   echo. 1>&2   echo Your commit has been blocked because you didn‘t enter a comment. 1>&2   echo Write a log message describing the changes made and try again. 1>&2 echo Thanks 1>&2 exit 1

http://stackoverflow.com/questions/869248/windows-pre-commit-hook-for-comment-length-subversion

Windows Pre-commit hook for comment length Subversion